bonus (n.)
- balance
- bounty
- bribe
- compensation
- consideration
- decoration
- discovery
- dividend
- extra
- fee
- filigree
- filling
- fillip
- find
- finding
- flourish
- foundling
- frill
- gratuity
- gravy
- grease
- honorarium
- inducement
- lagniappe
- largess
- largesse
- leftover
- liberality
- margin
- ornament
- overage
- overplus
- overrun
- oversupply
- padding
- perk
- perquisite
- plus
- pourboire
- premium
- remainder
- remuneration
- reward
- salve
- spare
- stuffing
- surplus
- surplusage
- sweetener
- tip
- trimming
- trove
- twist
- windfall
- wrinkle